Insulated cable termination assembly and method of fabrication

• US 7,192,319 B1
• Filed: 11/28/2005
• Issued: 03/20/2007
• Est. Priority Date: 11/28/2005
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Rahman, Naeem, Czyz, Anthony, Hann, Mark Steven
• Primary Examiner(s): Gushi; Ross
• Application Number:
  US11/287,625
• Time in Patent Office: 477 Days
• Field of Search: 439/621, 439/766, 439/765, 439/801, 439/883, 320/108, 336/DIG.2
• US Class Current: 439/766
• CPC Class Codes: H01H 2085/025 Structural association with a binding post of a storage battery
• CPC Class Codes: H01H 85/044 General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified H01H85/046 - H01H85/048 take precedence
• CPC Class Codes: H01H 85/205 Electric connections to contacts on the base
• CPC Class Codes: H01R 11/12 End pieces terminating in an eye, hook, or fork
• CPC Class Codes: H01R 4/22 End caps, i.e. of insulating or conductive material for covering or maintaining connections between wires entering the cap from the same end
• CPC Class Codes: H01R 4/305 having means for facilitating engagement of conductive member or for holding it in position
• CPC Class Codes: H01R 4/70 Insulation of connections end caps H01R4/22

Abstract

A cable termination assembly includes a ring terminal with mechanically coupled insulating assembly electrically isolating a terminal post from the ring terminal. Methods of fabricating the assembly are also described.

Claims

1. A ring terminal assembly for a terminal post, the assembly comprising:

a conductive ring terminal configured to connect to a cable and defining an opening therein configured to receive the terminal post; and

a nonconductive insulating assembly fixed to the ring terminal and mounted to the opening;

wherein the insulating assembly electrically isolates the conductive ring terminal from the post; and

wherein the ring terminal comprises opposed surfaces with the opening extending therebetween, the insulating assembly extending away from each of the opposed surfaces.

2. The termination assembly of claim 1, wherein the insulating assembly comprises a cylindrical insert having resilient tabs that are snap-fit to the opening.

3. The termination assembly of claim 1, wherein the insulating assembly comprises a first nonconductive portion defining an annular groove and a second nonconductive portion defining an annular rib, the rib positioned in said groove and retaining the first portion to the second portion.

4. The termination assembly of claim 1, wherein the insulating assembly comprises a body defining an annular groove, the groove receiving the ring terminal adjacent the opening to retain the insulating assembly to the ring terminal.

5. A ring terminal assembly for a terminal post, the assembly comprising:

a conductive ring terminal configured to connect to a cable and defining an opening therein configured to receive the terminal post; and

a nonconductive insulating assembly fixed to the ring terminal and mounted to the opening;

wherein the insulating assembly electrically isolates the conductive ring terminal from the post; and

wherein the insulating assembly comprises an insulating collar fabricated from a first insulating material, and an insulating insert fabricated from a second insulating material different from the first material.

6. A cable termination assembly comprising:

a terminal post;

a conductive ring terminal defining an opening therein, the opening dimensioned to receive the terminal post; and

a nonconductive insulating assembly mounted stationary to the ring terminal and mechanically coupled to the ring terminal at the outer periphery of the opening, whereby when the conductive ring terminal is moved the nonconductive insulating assembly moves together with the conductive ring terminal;

wherein the insulating assembly is positioned between the terminal post and an edge of the ring terminal adjacent the opening when the ring terminal is inserted over the terminal post; and

wherein the terminal post extends from a storage battery.

7. The termination assembly of claim 6, wherein the insulating assembly is fabricated from a resilient material and is adapted to snap-fit to the opening.

8. The termination assembly of claim 6, wherein the ring terminal comprises opposed surfaces with the opening extending therebetween, the insulating assembly extending away from each of the opposed surfaces.

9. The termination assembly of claim 6, wherein the insulating assembly comprises an insulating collar fabricated from a first insulating material, and an insulating insert fabricated from a second insulating material different from the first material.

10. The termination assembly of claim 6, wherein the insulating assembly comprises a first nonconductive portion defining an annular groove and a second nonconductive portion defining an annular rib, the rib positioned in said groove and retaining the first portion to the second portion.

11. The termination assembly of claim 6, wherein the insulating assembly comprises a body defining an annular groove, the groove receiving an edge of the ring terminal adjacent the opening retain the insulating assembly to the ring terminal.

12. The termination assembly of claim 6, further comprising a bus bar, the terminal post mounted to the bus bar.

13. The termination assembly of claim 6, further comprising a fuse, wherein a surface of the conducting ring terminal engages the fuse and the insulating assembly electrically isolates the conductive ring terminal from the terminal post.

14. A cable termination assembly comprising:

a terminal post;

a fuse inserted over the terminal post;

a conductive ring terminal defining an opening therein, the opening inserted over the terminal post and in surface engagement with the fuse; and

a nonconductive insulating assembly mounted stationary to the ring terminal, the insulating assembly comprising a first portion fabricated from a first non-conductive material and defining first and second annular grooves, and a second portion fabricated from a second material and defining an annular rib;

wherein the annular rib is received in one of the first and second annular grooves thereby retaining the first portion to the second portion, the second portion extending away from the conductive ring terminal in a first direction;

wherein the outer periphery of the opening is received in the other of the first and second annular grooves thereby retaining the conductive ring terminal to the first portion, the first portion extending through the opening and away from the conductive ring terminal in a second direction opposite to the first direction; and

wherein the insulating assembly is positioned between the terminal post and an inner edge of the ring terminal adjacent the opening when the ring terminal is inserted over the terminal post.

15. The termination assembly of claim 14, wherein the first portion comprises a cylindrical insert having resilient tabs that are snap-fit to the opening.

16. The termination assembly of claim 14, wherein when the conductive ring terminal is moved the nonconductive insulating assembly moves together with the conductive ring terminal.

17. The termination assembly of claim 14, wherein one of the first and second portions is fabricated from plastic.

18. The termination assembly of claim 14, wherein one of the first and second portions is fabricated from ceramic.

19. The termination assembly of claim 14, further comprising a bus bar, the terminal post mounted to the bus bar.

20. The termination assembly of claim 15, wherein the terminal post extends from a storage battery.

21. The termination assembly of claim 15, wherein a surface of the conducting ring terminal engages the fuse and the insulating assembly prevents the conductive ring terminal from establishing electrical connection with the terminal post when the conductive ring is inserted over the terminal post.

22. A method of fabricating a cable termination assembly comprising:

providing a conductive ring terminal having a first surface, a second surface and an opening extending between the first surface and the second surface;

forming a nonconductive and resilient insert having a deflectable skirt; and

fitting the deflectable skirt into the opening to mount the insulating assembly in a stationary position relative to the ring terminal, wherein the outer periphery of the opening is covered by the insert to prevent inadvertent electrical contact with the outer periphery of the opening.

23. The method of claim 22, further comprising:

forming the insert with an annular ring; and

snapping the ring onto the outer periphery of the opening.

24. The method of claim 22 wherein forming the insert further comprises:

providing a rigid collar; and

molding the insert to the collar to permanently couple the collar to the insert.

25. A cable termination assembly comprising:

a terminal post;

a ring terminal adapted to be inserted over the post; and

means for insulating the ring terminal and preventing electrical connection between the terminal and the post when the ring terminal is inserted over the post, the means for insulating being mechanically coupled to and fixedly mounted to the ring terminal, whereby when the ring terminal is moved over the terminal post, the means for insulating is moved with the ring terminal;

wherein the means for insulating comprises a rigid portion and a resilient portion, each of the rigid portion and the resilient portion extending from opposing surfaces of the ring terminal.

26. The cable termination assembly of claim 25, wherein the means for insulating comprises a first portion interlocked with a second portion by an annular rib and an annular groove, respectively.

27. The cable termination assembly of claim 25, wherein the means for insulating comprises a resilient insert adapted for snap fit insertion into the opening.